September 27

Sept. 27, 1962: Rachel Carson (at right), a U.S. government biologist, publishes "Silent Spring." The groundbreaking environmental book prompts a furious backlash from the chemical industry, but Carson’s reporting on the damage to bird populations from the pesticide DDT eventually leads to a ban on the use of the chemical.

Sept. 27, 2006: California Gov. Arnold Schwarzenegger signs a law capping greenhouse gas emissions, becoming the first U.S. governor to do so.

Sept. 27, 2009: Ken Burns, the renowned producer of American history documentaries, debuts "The National Parks: America’s Best Idea" on PBS. The six-part series chronicles the struggles to create Yellowstone, Yosemite, and the other iconic U.S. preserves, as well as the visionaries who helped create them.

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